prosappweb/lib/services/notifications_service.dart

import 'package:flutter/material.dart';

class NotificationsService {
  static GlobalKey<ScaffoldMessengerState> messengerKey = GlobalKey<ScaffoldMessengerState>();

  static showSnackBarError(String message) {
    final snackBar = SnackBar(
      backgroundColor: Colors.red.withOpacity(0.9),
      content: Text(
        message,
        style: const TextStyle(
          color: Colors.white,
          fontSize: 20,
        ),
      ),
    );

    messengerKey.currentState!
      ..removeCurrentSnackBar()
      ..showSnackBar(snackBar);
  }

  static showSnackbar(String message) {
    final snackBar = SnackBar(
      backgroundColor: Colors.blue.withOpacity(0.9),
      content: Text(
        message,
        style: const TextStyle(
          color: Colors.white,
          fontSize: 20,
        ),
      ),
    );

    messengerKey.currentState!
      ..removeCurrentSnackBar()
      ..showSnackBar(snackBar);
  }

  static showBusyIndicator(BuildContext context) {
    const AlertDialog dialog = AlertDialog(
      content: SizedBox(
        width: 100,
        height: 100,
        child: Center(
          child: CircularProgressIndicator(),
        ),
      ),
    );

    showDialog(context: context, builder: (_) => dialog);
  }
}